Please help ! :D (a test) The image of point A after a dilation of 3 is (6, 15). What was the original location of point A?

A (2, 5)
B (3, 12)
C (9, 18)
D (18, 45)

Item 1 which question could the expression 1000n answer? let n = the number of gallons of gas used. how many miles per gallon did the car get driving 1000 miles? let n = the number of grams of food needed for each dog. how many grams of food are needed to feed 1000 dogs? let n = the number of people at the show. how many empty seats were there at the show if there are 1000 seats at the theater? let n = the number of seats at the theater. how many empty seats will there by if 1000 people come to the show?